Description
A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Exploits (1)
References (4)
Core 4
Core References
Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1926263
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202104-05
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20220325-0001/
Scores
CVSS v3
8.2
EPSS
0.0021
EPSS Percentile
43.0%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Details
CWE
CWE-787
Status
published
Products (20)
fedoraproject/fedora
33
fedoraproject/fedora
34
gnu/grub2
< 2.06
netapp/ontap_select_deploy_administration_utility
redhat/enterprise_linux
7.0
redhat/enterprise_linux
8.0
redhat/enterprise_linux_server_aus
7.2
redhat/enterprise_linux_server_aus
7.3
redhat/enterprise_linux_server_aus
7.4
redhat/enterprise_linux_server_aus
7.6
... and 10 more
Published
Mar 03, 2021
Tracked Since
Feb 18, 2026